springboot jackjson驼峰转下划线

有以下几种方法

一、经过ObjectMapper设置

mapper.setPropertyNamingStrategy(com.fasterxml.jackson.databind.PropertyNamingStrategy.SNAKE_CASE);
mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);

二、经过在application.properties增长以下配置

spring.jackson.property-naming-strategy=CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES

便可

注意事项，当开启@EnableSwagger2注解时候，会报jackjson异常，查看是swagger使用的api比较旧，不支持

java.lang.NoSuchMethodException: com.fasterxml.jackson.databind.introspect.POJOPropertyBuilder.<init>(com.fasterxml.jackson.databind.PropertyName, com.fasterxml.jackson.databind.AnnotationIntrospector, boolean)
	at java.lang.Class.getConstructor0(Class.java:3082)
	at java.lang.Class.getConstructor(Class.java:1825)
	at springfox.documentation.schema.property.PojoPropertyBuilderFactory.constructorWithParams(PojoPropertyBuilderFactory.java:105)
	at springfox.documentation.schema.property.PojoPropertyBuilderFactory.jackson26Instance(PojoPropertyBuilderFactory.java:89)
	at springfox.documentation.schema.property.PojoPropertyBuilderFactory.create(PojoPropertyBuilderFactory.java:42)
	at springfox.documentation.schema.property.BeanPropertyDefinitions.getName(BeanPropertyDefinitions.java:69)
	at springfox.documentation.schema.property.BeanPropertyDefinitions.access$000(BeanPropertyDefinitions.java:28)
	at springfox.documentation.schema.property.BeanPropertyDefinitions$2.apply(BeanPropertyDefinitions.java:58)
	at springfox.documentation.schema.property.BeanPropertyDefinitions$2.apply(BeanPropertyDefinitions.java:55)
	at com.google.common.base.Present.transform(Present.java:77)
	at springfox.documentation.schema.property.ObjectMapperBeanPropertyNamingStrategy.nameForSerialization(ObjectMapperBeanPropertyNamingStrategy.java:56)
	at springfox.documentation.schema.property.BeanPropertyDefinitions.name(BeanPropertyDefinitions.java:46)
	at springfox.documentation.schema.property.OptimizedModelPropertiesProvider.beanModelProperty(OptimizedModelPropertiesProvider.java:281)
	at springfox.documentation.schema.property.OptimizedModelPropertiesProvider.access$200(OptimizedModelPropertiesProvider.java:79)
	at springfox.documentation.schema.property.OptimizedModelPropertiesProvider$2.apply(OptimizedModelPropertiesProvider.java:163)
	at springfox.documentation.schema.property.OptimizedModelPropertiesProvider$2.apply(OptimizedModelPropertiesProvider.java:155)

相似问题：https://groups.google.com/forum/#!msg/swagger-swaggersocket/AUvwW1a03mQ/ezSxddEZAgAJ

三、采用在实体增长注解实现

//实现驼峰转下划线
@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
public class BaseResultVO {
}

实体继承该类便可。如此不用每一个类的字段都注明@jsonproperty注解

参考资料：Jackson 在 Spring Boot 中的使用小结 1